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 Hans
von Pechmann (1850 - 1902) was a German chemist, renowned for
his discovery of diazomethane, Pechmann condensation and Pechmann
pyrazole synthesis. He also first prepared 1,2-diketones (e.g.,
diacetyl), acetonedicarboxylic acid, methylglyoxal and
diphenyltriketone; established the symmetrical structure of
anthraquinone.
Von Pechmann also discovered polyethylene plastics
serendipitously, when accidentally heating diazomethane.
After studying with Heinrich Limpricht at the University of
Greifswald he became Professor at the University of Munich till
1895. He was professor at the University of Tübingen from 1895
till his death in 1902.
H. v. Pechmann
(1894). "Ueber Diazomethan". Berichte der deutschen chemischen
Gesellschaft 27 (2): 1888–1891
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